Quinophthalonesulfonic acids containing halogen and process of making same.



EBWIN HOFFA, on Hoons'r-on-THE-MAIn, GERMANY, asstenon T0 FARBWERKE vonM. MEIS'IER Luc us & nntimne, 0F HooHs'r-on-TnE-MAIN, GERMANY, a.

CORPORATION OF GERMANY opinornrnanonnsonnomo ACIDS ooiwrnmme HALOGEN AND Pnocnss on MAKING SAME.

No Drawing.

I have madethe suprising observation that unlike the non-siibstituted quinolin-yellow, those of its substitution products which contain chlorin in the benzene nucleus of the quinaldin residue, being, however, at the samotime substituted in ortho positiogi to the nitrogen, are remarkable for their great .fastness to light this substitution ,ofthe halogenated quinaldin in ortho position can have been eifected' by means oichlorin itself or a methyl group; inthehalogenated dyestufi 1 substituted in ortho position to the nitrogen thereimay be alsofan additional hydrogen atom replaced by methyl. Therefore, these new roducts' constitute quince phthalones whiclilare from halogenated 'quin'aldinsand: their homnlogues'respectiyely which contain either a halogen or a methyl group in position to thenitrogen and which consequently correspond to the general formula:

l N C(CHa) I wherein vX represents a halogen, hydrogen ..or methyl, and R represents a halogen or methyl, either of which stands in the henzone nucleus in ortho position to the nitrogen, "one of these new products having the formula? Specification of Letters Patent. Patented Sept, 12, 1916..

Application filed April 6, .1914. Serial No. 830,046. I

dyestuffs described in U. s. Patent No.

890,588 by considerably greater fastness to light. I

As parent products for the preparation of such q'uin'aldins as may be employed in the process above referred to, the following bases will, for instance, serve: o-chloranilin, 3-chloroi-toluidin, 5-chloro-2-toluidin, 6- chloro-Q-toluidin. 1

The following example will illustrate my invention": A mixture consisting of 0 parts othydrorihloric acid, 13 parts of o-chloran1linand 10 parts of paraldehyde is heated for 5 hours to about 100 C. The chloroquinaldin can be'isolated from the product of the reaction by any ofthe methods employed 'inthe preparation of quinaldin.

.When recrystallized from ligroin it forms a colorless body melting at 68-70 C. .59 parts of the chloroquinaldin thus obtained are heated with 50 parts of phthalic anhydrid for two hours to 200-2l0 C. .The mass, which is at first liquid, solidifies into a yellow crystalline mass, namely the chloroquinophthalone, a body --with a very high melting pqint. The chloroquinophthalone.

when heated with 'ten toftwenty times the quantityofoleum containing 20 per cent. of S0 converted 1 into the sulfonic acid, whieh'dyes wool yellow tints with-a green hue of excellent fastness-to lights.

W inyjnyention what HavingIno I claim ISI,"

As 1 Pi hes, [the preparation of dyestuffs of the 'qninolln yellow. series con-- taming halogen and being... fast to ,light',

which consists in condensingwith phthalic anhydrid the-halogenated quinaldins of the general. formula; i 1

wherein X represents avhalogen, hydrogen or methyl, and R representsla halogen or methyl, standing in the benzene nucleus in ortho position to the nitrogen, and sulfonating the resulting substituted quinophthalones.

'02.- methyl,

2. new preelnets, the quinophthalone snlfenie acids containing halogen, of which the quinaldlns, used as starting material, een'esyeml to the formula:

CE=CH represents e halogen, hydrogen, and R represents a halogen or nieiJh M standing in the benzene nucleus in 633th!) position be the nitrogen, constituting wherein X 0 the .nliiregen, the final gained-- 1,1.e7,ese

yellow water-seluhle clyesi'ufis, dyeing ewel yellow 'ilnts ofexcellent fastness to hghie 3. As a new prolluct, the ortho-chloro- -qninephthalenesulfonic acid, having the formula en=on C0 Sulfo- 0 wherein the chlorln atom stands in the benzene nucleus in ortho posiiion to the mitogen, the product being e yellow powder readily soluble in water, its solution. dyeing W001 ellow tints with a green hueancl of excellent fastness to light.

In testimony whereof I affix my signature in presence of two Witnesses. v

ERVVIN HOFF A. Witnesses JEAN GRUND, CARL GRUND. 

